Revert "overclocking: add missing #ifdef"

This reverts commit 4e08c860d47a3ef138b6cf327586facb5bdad5e8.
Revert "overclocking: detect CONFIG_CPU_OVERCLOCK"

This reverts commit a5002e6efb984b18c813e333f7d533ecd38701fe.
Revert "overclocking: initial MSM S4-pro overclocking to 2.3GHz"

This reverts commit 497eca40f4a211376162d309165eb0430b710836.